[1] Univ Paris 07, Fac Med Lariboisiere St Louis, Expt Radiol Lab, CNRS UMR 7052, F-7052 Paris, France
[2] Hop Lariboisiere, AP HP, Serv Radiol Osteoarticulaire, F-75475 Paris, France
[3] Hop St Louis, AP HP, Serv Radiol, Paris, France
[4] Hop Roger Salengro, Serv Rhumatol, Lille, France